The United States Navy struck and sank an Iranian warship in the Indian Ocean in a military action that officials say signals a sharp escalation in global naval warfare and delivers a stark warning to China and Russia about American maritime dominance. What might once have been a shadowy undersea encounter has instead become a defining, publicly acknowledged moment in a rapidly widening conflict.
Three days of intense military operations saw the Iranian frigate IRIS Dena destroyed by a torpedo fired from a United States submarine in international waters off the coast of Sri Lanka, Defence Secretary Pete Hegseth told reporters. The engagement, confirmed on 4 March 2026, marked the first time since the Second World War that a US submarine had sunk an enemy warship with a torpedo, a development that analysts say could reshape strategic calculations for rivals such as China and Russia.
